Valve arrangement for internal-combustin engines.



e. DAUBER. VALVE ARRANGEMENT FOR INTERNAL COMBUSTION ENGINES.. I

APPLICATION FILED IAN- 26. I911.

1,151,926., Patented Aug. 31, 1915.

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GISBERT DAUBER, OF ALT HElKENDoRF, GERMANY, ASSIGNOR TO FRIED. KRUPP AKTIEINGESELLSCHAFT GERMANIAWERFT, 0F KIEL-GAARDEN, GERMANY.

VALVE ARRANGEMENT FOR INTERNAL-COMBUSTION ENGINES.

Application filed January 26, 1911.

Internal-Combustion Engines, of which the following is a specification.

This invention relates to the valve. arrangement of internal combustion engines with cylinders of large dimensions.

In the hitherto known internal combustion engines of this class, as for example in large gas engines of the horizontal type, the valves are so arranged that a single suction valve arranged radially to the axis of the cylinder and a single similarly arranged exhaust valve are situated diametrically opposite Now as these valves must possess very large cross sectional areas to correspond to the large dimensions of the cylinders, the cylinder walls, are greatly weakened on one side and unfavorably influenced in respect of their strength. Distortion of the cylinder walls in particular can easily take place in the case of such cylinders owing to the great heat suddenly developed when the engine is started.

Now the object of this invention is to provide an internal combustion engine of the kind hereinbefore described whereby these disadvantages shall be avoided with certainty.

The invention is illustrated by way of example in the drawing in which Figure 1 is a longitudinal section on the line of Fig. 2 and inclined to the horizontal at an angle of 4!" of the working cylinder of a double acting four stroke cycle internal combustion engine of the horizontal type. Fig. 2 is a section on the line 66 of Fig. 1, lookingfrom the left.

The constructional form of the invention shown in Figs. LandQ will now be described.

Figs. 1 and 2 show the application of the invention to a horizontal four 'stroke'cycle internal combustion engine in which the fuel is injected into the cvlinder. The arrangement of the suction and exhaust valves D E is the same as in the four stroke cycle internal combustion engine described with reference to Figs. 1' and 2. The cylinder heads C have in contradistinction to the cylinder heads shown in Fig. 1 projections 0 which extend toward the interior of the cyl- Specification of Letters Patent.

Patented Aug. 31, 1915.

Serial No. 604,878.

inder and the form of which is shown in Figs. 1 and 2. By this means there are formed two combustion chambers K of angular curved form, each of which incloses a suction valve D and an exhaust valve E. In the center between the valves D E belonging to each combustion chamber K is arranged a fuel injecting valve L. These fuel injecting valves each have three outlet openings Z Z for the fuel, of which openings the two outer ones Z are directed into the two limbs of the angularly shaped combustion chambers K and the center one Z onto the edge of the projection c lying opposite it and which, as

shown in Fig. 2 by drawn lines, may be sharp edged, or, as indicated by dot and dashlines, more rounded off.

By the uniformdistribution of the valves (2'. e. suction and exhaust valves), which weaken the cylinder jacket most because they are the largest, all onesided weakening of the cylinder jacket and injurious distortion thereof is also avoided in this injection internal combustion engine. At the same time the described arrangement of the injecting valve L insures that the fuel injected is uniformly distributed over the highly compressed air to support combustion which is contained when the engine is working, in the combustion chambers K.

If the invention is not to be applied to a four stroke cycle injection internal combustion engine but to a two stroke cycle one with exhaust ports controlled by the work-- ing piston, two similar scavenging valves will have to be arranged in each combustion chamber instead of a suction and exhaust valve.

Instead of placing the projections & which bound the combustion chambers K in the cylinder heads C and shaping the face of the working piston similarly, they might also as indicated by dot and dash lines in Fig. 1 (0 be arranged on the fronts of the working piston and the cylinder covers shaped to fit them.

The arrangement of the suction, exhaust and scavenging valves is not confined to the exact uniform distribution thereof over the periphery of the cylinder. The valves may. on the contrary. and without thereby changing the essential feature of the invention, be arranged, should the construction of the engine necessitate it, so as to deviate by small angles from the uniform distribution.

I claim:

1. In an internal combustion engine, a cylinder, a piston, and a cylinder head constructed to form with said cylinder and piston a pair of combustion chambers symmetrically disposed in a transverse plane of the cylinder, a fuel injection valve for each combustion chamber, and a plurality of valves communicating with each combustion chamber and symmetrically disposed with relation to the combustion chamber and its fuel injection valve.

2. In an internal. combustion engine, the combination of a cylinder, a cylinder head and piston suitably related to said cylinder, a projection across the interior of said cylinder on one of said related members, dividing the space in the-cylinder between said piston and said cylinder head into a pair of combustion chambers, and a pair of valve ports communicating with and symmetrically disposed With relation to each combustion chamber. a I

3. In an internal combustion engine of relatively large dimensions, having a cylinder, a piston and a cylinder head, an axial extension across the interior of the cylinder forming in connection with -said piston, cylinder head and the wall of the cylinder, a pair of combustion chambers symmetrically disposed in the transverse plane of said cylinder, said extension being constructed to divide each combustion chamber into two compartments with a separating ridge between them,

large dimensions, the combination of the cyl-' inder having a head and a piston, an axial extension on said cylinder head across the interior of the cylinder, dividing the space in the cylinder, between said piston and said head into a pair of combustion chambers said axial extension constructed to form a ridge in each combustion chamber separating it into two compartments, a fuel injector presented through the cylindrical wall opposite each ridge and directing the fuel into the respective compartments of the combustion chamber, and a plurality of valves associated with each combustion chamber; all of said valves being symmetrically distributed around the cylinder and with relation to the compartments of the combustion chambers.

The foregoing specification signed at Kiel, Germany this 5th day of January, 1911.

JULIUs ROJKE, BRUNO GoscH. 

